Londoners are being urged to remain vigilant towards the threat of terror attacks as a week long counter-terrorism initiative is launched today.

The drive - known as Operation Griffin - will involve co-ordinated activity between police services and the public held at locations ranging from local shop owners in Sutton, to a large scale briefing with the business community at The Shard.

Involving the Metropolitan Police Service (MPS), City of London Police (CoLP) and British Transport Police (BTP), the aim is to remind Londoners not to be complacent about terror threats and to remind them that they can play a ‘vital role’ in protecting the capital.

Commander Simon Bray, from Specialist Operations, said: "The threat to London from terrorism remains real and serious, so we encourage the public to remain vigilant and alert and to report anything suspicious to police."

Automatic number plat recognition and high visibility patrols will form part of activities taking place across all 32 boroughs between today and Sunday.

Project organisers say the move isn’t sparked by a particular threat but has been an annual event for 10 years.

Its remit is to advise and familiarise managers, security officers and employees of large public and private sector organisations across the capital on security, counter-terrorism and crime prevention issues.